HYDROGRAPHY. 



directions through openings between the different islands. If this be 

 decided on, then stand for Mount Erie, on Perry's Island, which will 

 lead directly into that bay. The only dangers lying off are the Wil- 

 liamson Rocks. Wood and water may be obtained at an Indian settle- 

 ment in the bay, and some provisions. 



NAVY ARCHIPELAGO. 



Navy Archipelago is a collection of 25 islands, having the Straits 

 of Fuca on the south, the Gulf of Georgia on the north, the Canal de 

 Arro on the west, and Ringgold's Channel on the east. They have 

 been named from distinguished officers late of the U. S. naval service, 

 viz., Roclgers, Chauncey, Hull, Shaw, Decatur, Jones, Blakeley, Perry, 

 Sinclair, Lawrence, Gordon, Percival, and others. Most of them 

 are of moderate elevation. Mount Constitution, on Hull's Island, 

 rises to the height of 2356 feet. Hull's Island is the largest ; it is 

 indented by two deep bays, one of which has been called Ironsides, 

 the other Guerriere Bay. It is composed of reddish granite and con- 

 glomerate ; in some places the granite is seen to crop out. Both 

 Rodgers and Chauncey Islands partake of the same character. On 

 the north of Rodgers Island, and between it and Hull's, is President's 

 Passage, 8 miles in length, by 1 to 2 in width. This passes into 

 Ontario Roads, between Rodgers and Chauncey Islands, and again 

 communicates on the south with De Fuca Strait, by the Little Belt 

 Passage ; on the north, the waters flow through Frolic Straits, into 

 Ironsides Bay, and around the Macedonian Crescent, between Blakeley 

 nnd Obstruction, Decatur and Blakeley Islands, again into Ringgold 

 Channel. The soundings throughout these waters are very deep, 

 seldom less than 30 fathoms. 



RINGGOLD CHANNEL. 



Ringgold Channel leads from the head of the Strait of Juan de 

 Fuca to the Gulf of Georgia. It is 19 miles in length, by from 1 to 

 3 miles wide. On the east it is bounded by McLaughlin, Sinclair, 

 Cypress, and Perry Islands ; while on the west it has Hull, Blakeley, 

 Decatur, and Chauncey. This channel trends nearly north and 



